JPH1042992A - Seat reclining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the stress concentration to a shaft fit section between a seat side bracket and a backrest seat side bracket, miniaturize a device, facilitate assembling, improve assembling accuracy and strength, facilitate the installation of lock devices on both the right and left sides of a seat, and simplify the operation mechanisms of the right and left lock devices. SOLUTION: This reclining device is provided with lock devices 60 on both the right and left sides so that a backrest seat side bracket can be rotated against a seat side bracket at an adjustable inclination angle. A gear section 62 is provided on the operation lever 40 of one lock device 60, a passive gear 63 is meshed with the gear section 62, the other side gear section 70 is provided on a transmission arm 69 operating the other lock device 60, the other side passive gear 67 is meshed with the other side gear 70, and the passive gear 63 and the other side passive gear 67 are connected by a connecting shaft 66 in the lateral direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat reclining device for adjusting a tilt angle of a backrest sheet.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No. 7-204407 discloses a seat bracket and a backrest seat bracket which are rotatably mounted on a horizontal shaft. A seat reclining device in which an arc gear having a center as a center is formed, and a backrest seat side bracket is movably provided with a lock member which moves in a radial direction of a horizontal axis and is connected to and disconnected from the arc gear. Japanese Patent Application Laid-Open Publication No. 7-265154 discloses a circular hole in one of a seat-side bracket and a backrest-side bracket, and a circular gear formed on an end surface near the fitting hole. A full-moon-shaped bulged portion having an arc portion which is concentric with the fitting hole and slidably contacts the inner wall surface, on one of the other of the seat-side bracket and the backrest-side bracket; And a lock sliding groove formed in a portion formed by a lock member that connects to and disengages from the arc gear, and the fitting hole is the same as the separately provided one side fitting member. A reclining device for a seat configured to be sandwiched by a fitting member on the other side of the shape is described. Although not conventionally known, Japanese Patent Application No. Hei 7-35432 filed by the same applicant describes a configuration in which left and right lock devices are connected by a link mechanism.

[0003]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 7-204.
In the device described in Japanese Patent No. 047, since the seat-side bracket and the backrest-side bracket are axially mounted on the horizontal axis, there is a problem that stress is concentrated on the axially mounted portion. Japanese Patent Application Laid-Open No. 7-265154 has a problem that the entire device becomes large because the lock member is provided at a position away from the center of rotation of the backrest seat side bracket. That is, when a fitting hole is formed in one of the seat-side bracket and the backrest seat-side bracket, and a fitting member is formed in the other, and the two members are attached to each other, the load can be strongly supported. This makes it difficult to provide the device in the hole, and the device cannot be miniaturized. Further, the prior art does not devise a configuration for connecting the left and right locking devices. The present invention achieves both an improvement in load supporting strength for supporting a shaft attachment portion between a seat-side bracket and a backrest seat-side bracket with a surface, and downsizing of the device. Is devised about the connection configuration of the lock device.

[0004]

The object of the present invention is to prevent concentration of stress on the shaft attachment portion between the seat-side bracket and the backrest-side bracket, to reduce the size of the device, to facilitate assembly, to improve assembly accuracy, and to improve strength.
Easy installation of the locking devices on both sides of the seat, and simplification of the operating mechanism of the locking devices on the left and right.

[0005]

According to the present invention, there is provided an arc gear 24 provided on one of the seat-side bracket 1 and the backrest-side bracket and concentric with the center of rotation of the backrest-side bracket. Seat Seat side bracket 1
Alternatively, in a reclining device provided with a lock device 60 provided on either side of the backrest seat side bracket and a lock member 10 having a lock gear portion 23 connected to the arc gear 24 and provided on the left and right sides, the lock member 10 is provided. The operation lever 40 for connecting and disconnecting the arc gear 24 is fixed to one of the right and left locking devices 60 by the mounting horizontal shaft 36, and a gear portion 62 is separately or integrally formed at the base of the operation lever 40. And one end of a left-right connecting shaft 66 is fixed to the passive gear 63 meshing with the gear portion 62, and the other passive gear 67 symmetrical to the passive gear 63 is fixed to the other end of the connecting shaft 66. The other passive gear 67 is provided separately or integrally at the base of a transmission arm 69 for operating the lock member 10 of the left or right lock device 60. It is obtained by a sheet of reclining devices engage the side gear unit 70. The present invention is directed to a seat reclining device in which the passive gear 63 and the other-side passive gear 67 are provided with flange portions 65 and 72 respectively abutting on the respective side surfaces on the operation lever 40 side and the transmission arm 69 side. It was done. The present invention
The locking device 60 has an arc gear 24 formed on the inner peripheral surface 22 of the seat-side bracket 1 or the backrest-side bracket, concentric with the center of rotation of the backrest-side bracket. A circular hole 7 is provided in the other of either the seat-side bracket 1 or the backrest seat-side bracket, and the circular-arc portion 7 that fits into the fitting hole 18 and slides on the inner peripheral surface 22 is provided. A supporting and guiding member 3 is provided which is constituted by side bulging portions 4 and 5 having a guide linear portion 8 parallel to a radial direction passing through the center of the fitting hole 18 and facing the side bulging portions 4 and 5. This is a seat reclining device in which a lock sliding groove 33 is formed between the guide linear portions 8 and the lock member 10 which is connected to and disengaged from the arc gear 24.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Reference numeral denotes a seat-side bracket, which is fixed to an upper rail that slides on a lower rail of a slide rail fixed to the vehicle body in the embodiment. The support / guide member 3 is provided on the seat side bracket 1. The support and guide member 3 has a disk shape and is provided integrally or separately with the seat-side bracket 1. The support and guide member 3 has side bulges 4 and 5 bulging outward (to the left in the embodiment) arranged and formed so as to be vertically half-moon-shaped, and formed at the center of the support and guide member 3. They are arranged so as to be symmetrical about the insertion hole 6. Each of the side bulging portions 4 and 5 has an arc portion 7 formed in a perfect circular shape centering on the insertion hole 6 and a guide linear portion 8 formed linearly on the insertion hole 6 side, and is vertically divided. Although formed, the arc portion 7 and the guide linear portion 8
It is only necessary to have

A central bulging portion 11 is formed between the guide linear portions 8 arranged symmetrically with the insertion hole 6 interposed therebetween, the sliding portion being in sliding contact with a side surface of a lock member 10 described later.
The lower end of the central bulging portion 11 is positioned above the insertion hole 6, and a locking member is provided between the guide linear portions 8 symmetrically arranged with the insertion hole 6 below the insertion hole 6 interposed therebetween. A lower bulging portion 12 slidingly contacting the side surface of the lock member 10 and a stopper bulging portion below the lower bulging portion 12 for forming a stopper surface 13 for contacting the lower end of the lock member 10 and preventing excessive lowering. The part 14 is formed. A flange 15 protruding outward is formed on the entire periphery of the support and guide member 3 over the entire circumference.

Thus, a ring member 17 is provided on the side surface of the supporting and guiding member 3 so as to be fixed to the backrest sheet side. The ring member 17 is configured by providing a mounting portion 21 having a mounting hole 20 on a ring portion 19 having a circular fitting hole 18 concentric with the center of rotation of the backrest sheet. On the inner peripheral surface 22 of the fitting hole 18, the respective arc portions 7 of the side bulging portions 4 and 5 are provided.
And the lower surface of the stopper bulging portion 14 is brought into sliding contact.

The inner peripheral surface 22 above the fitting hole 18
Is formed with an arc gear 24 to which the lock gear portion 23 of the lock member 10 is connected. Therefore, the arc gear 24 is arranged around the rotation center of the backrest sheet. The lock member 10 is formed of a plate member having a predetermined thickness, is formed in a rectangular shape long in the sliding direction, and the lock gear portion 23 is provided on one surface in the sliding direction with the arc gear 24.
It is formed in an arc shape so as to mesh with. A cam groove 26 that is long in the sliding direction is formed at an intermediate portion in the length direction of the lock member 10. The lock gear portion 23 side of the cam groove 26 is formed on an unlocking retreat surface 27 that retreats so as not to come into contact when a contact portion 28a of a cam body 28 described below is in an unlocked state.

Following the unlocking evacuation surface 27, a contact surface 29 with which the contact portion 28a comes into contact is formed, and a step 30 protruding toward the center is formed following the contact surface 29, and the step 30 is formed on the step 30. Subsequently, the lock gear portion 23 is formed on the lock surface 31 that meshes with the arc gear 24. The opposite side of the cam groove 26 from the lock gear portion 23 is formed on an unlocking surface 32 to which the cam body 28 is applied when unlocking.

In this case, the step portion 30 is
Of the cam surface 28, the rotation of the contact surface 28a of the cam body 28 in the unlocking direction is smooth, and
The lock member 10 is formed on an inclined surface that prevents the lock member 10 from moving in the unlock direction. Thus, the lock member 10 has a lock sliding groove 33 formed between the guide linear portions 8 symmetrically arranged with the insertion holes 6 of the side bulging portions 4 and 5 interposed therebetween. And the front and rear surfaces of the lock member 10 slide in contact with the guide linear portion 8. Therefore, the side bulges 4 and 5 bulge laterally from the central bulge 11 and are formed at the same height as the stopper bulge 14.

The cam body 28 fitted in the cam groove 26
Are formed in a rhombus shape when viewed from the side, and the abutting portions 28a serving as the respective vertices are formed in an arc shape. A left-right direction insertion hole 35 is formed in the center of the cam body 28, and a left-right mounting horizontal shaft 36 is inserted into the insertion hole 35, and the mounting horizontal shaft 36 is supported by the insertion hole of the guide member 3. 6, the cam body 28 is axially mounted. The cam body 28 has lateral (anti-support and guide members 3)
Side) is provided. Horizontal shaft 36 for mounting
, An insertion hole 41 formed in the base of the operation lever 40 is inserted through and rotatably mounted on the shaft. A mounting hole 42 is formed in the operating lever 40, and the engaging pin 37 of the cam body 28 is inserted into the mounting hole 42. When the operating lever 40 is rotated, the engaging pin 37 rotates about the mounting horizontal shaft 36. Then, the cam body 28 is rotated about the mounting horizontal axis 36, and the lock member 10 is slid in the radial direction with respect to the mounting horizontal axis 36. Reference numeral 43 denotes an operation lever 40 in a direction in which the lock state of the lock member 10 is maintained.
Is a spring that biases the ring member 17 to rotate in a direction in which the backrest sheet rotates forward.

Although it is possible to constitute a reclining device for the seat by the supporting and guiding member 3 and the ring member 17, in this embodiment, the other supporting and guiding member 46 is provided outside the ring member 17. Is provided. The other side support / guide member 46 is formed of a disk, and the other side corresponding to each of the side bulges 4 and 5, the center bulge 11 and the stopper bulge 14 of the support / guide member 3. The side bulges 47 and 48, the other side central bulge 49, and the other side stopper bulge 50 are formed. In addition, a reinforcing rib 51 for reinforcement is provided on the upper portion of the other side central bulging portion 49, and a portion corresponding to the lower bulging portion 12 of the support and guide member 3 is omitted.

Reference numeral 52 denotes a central insertion hole; 53, a slot for inserting the engagement pin 37; 54, a linear guide portion on the other side; 55, a circular arc portion on the other side; and 56, a peripheral edge of the support and guide member 3. It is the other side flange portion corresponding to the flange portion 15 formed. Therefore, the ring member 17 is supported and guided by the guide member 3.
And the other side supporting and guiding member 46 is sandwiched from the left and right sides. That is, the other-side support and guide member 46 is connected to the one-side support and guide member 3 (the other-side support and guide member 4).
6 for the sake of comparison with FIG. 6), and constitute a holding member for holding the lock member 10 and the like.

The holding member abuts the other side bulging portion 47 of the other side supporting and guiding member 46 and the side bulging portion 4 of the one side supporting and guiding member 3 from the left and right without any gap. And fixed to each other by welding 57. Therefore, the side bulging portions 4 and 5 and the other side bulging portion 47 are formed to have the same thickness as the width of the fitting hole 18, and the flange portion 15 and the other side flange portion 56 are ring-shaped. It slides on the left and right side surfaces of the member 17. Thus, in the present application, a lock device 60 including the support / guide member 3, the ring member 17, the lock member 10, the cam body 28, the other side support / guide member 46, and the like is provided on both left and right sides.

An operation connecting mechanism 61 is provided between the left and right locking devices 60 so that the left and right locking devices 60 can be simultaneously operated by operating the operation lever 40. The operation lever 40 is provided on the lock device 60 on one of the left and right sides,
A gear portion 62 is separately or integrally provided on the opposite side of the mounting horizontal shaft 36 of the operation lever 40 so as to protrude rearward. The gear portion 62 meshes with teeth 64 of the passive gear 63. The passive gear 63 is formed with a flange portion 65 that comes into contact with the side surface of the gear portion 62 on the side of the support and guide member 3.

The passive gear 63 has a left-right connecting shaft 6.
6, one end (left end) is fixed, and the other end (right end) of the connecting shaft 66
, A passive gear 67 having the same shape as that of the passive gear 63 is fixed. The teeth 68 of the other passive gear 67 mesh with the other gear 70 formed at the rear of the transmission arm 69 corresponding to the operation lever 40. The other-side passive gear 67 has the other-side flange portion 7 abutting on the side surface of the other-side gear portion 70.
Form 2 The transmission arm 69 is axially mounted with the insertion hole 73 inserted through the mounting horizontal shaft 36 ′ which is arranged coaxially with the mounting horizontal shaft 36 ′, and is mounted on the transmission arm 69. Then, the engaging pin 37 provided on the cam body 28 is inserted through, and the cam body 28 of the lock device 60 on the other side is operated.
Therefore, the left and right lock devices 60 are connected to the transmission arms 69.
Except for, it is formed symmetrically.

[0018]

Next, the operation will be described. The lock member 10 is fitted in the lock slide groove 33 of the support and guide member 3, the cam body 28 is fitted in the cam groove 26 of the lock member 10, and the outer periphery of the arc portion 7 of the side bulging portions 4, 5. Fitting hole 18 of ring member 17
And the mounting horizontal shaft 36 is skewed from the insertion hole 6 of the support and guide member 3 to the insertion hole 35 of the cam body 28, and the other support and guide member 46 in a paired relationship with the support and guide member 3.
Is passed through the horizontal mounting shaft 36. Next, the mounting horizontal shaft 36
The base of the operating lever 40 is rotatably inserted into the mounting lever 40, the engaging pin 37 of the cam body 28 is inserted into the mounting hole 42 of the operating lever 40, and the lock gear portion 2 is provided between the operating lever 40 and the fixed portion.
A spring 43 is urged to engage the circular gear 24 of the ring member 17 with the spring 4.
When one end of 3 is locked and the other end is locked to the pin of the ring member 17, the assembly is completed.

When the operating lever 40 is rotated, the engaging pin 37 rotates clockwise in FIG. 1 around the mounting horizontal shaft 36, and the engaging pin 37 connects the cam body 28 to the mounting horizontal shaft 3.
Since the clockwise rotation is performed about the center of the cam member 6, the cam body 28 abuts on the inner periphery of the cam groove 26 of the lock member 10 and slides the lock gear portion 23 so as to separate from the arc gear 24 of the ring member 17. Accordingly, the backrest seat-side bracket (ring member 17 side) is freely rotatable with respect to the seat-side bracket 1, and when the position of the backrest seat-side bracket is adjusted to a desired angle and then the operation lever 40 is released. The operating lever 40 is returned by the elastic force of the spring 43, and the engaging pin 37 also rotates about the horizontal mounting shaft 36.
, And the lock member 10 is slid so that the lock gear portion 23 is engaged with the arc gear 24 to lock.

In this case, the inner peripheral surface 22 of the fitting hole 18 of the ring member 17 fixed to the backrest seat-side bracket slides on the arcuate portion 7 of the side bulging portions 4 and 5 of the support and guide member 3. Because of the rotation, the load applied to the back seat side bracket is applied to the side bulging portions 4 and 5 via the fitting holes 18, and the side bulging portions 4 and 5 support the load on the surface of the circular arc portion 7. I strongly support you. Therefore, the weight of members such as the seat-side bracket 1 and the backrest-side bracket can be reduced to reduce the weight. Thus, the inner peripheral surface 2 of the ring member 17
2, the arc gear 24 is formed, the lock slide groove 33 of the lock member 10 is formed in the radial direction passing through the center of the ring member 17, and the lock member 10 is fitted in the lock slide groove 33. The lock mechanism can be made compact.

In this case, since the lock sliding groove 33 is formed between the guide linear portions 8 of the pair of side bulges 4 and 5, the front and rear surfaces of the lock member 10 slide on the guide linear portions 8. Because they are in contact with each other, they guide the sliding and make sure they slide. Therefore, the support and guide member 3 having the guide linear portion 8 also acts as a guide for the lock member 10, is easy to manufacture without special assembling and assembling, and contributes to cost reduction and reduction in size and weight. Further, since the lock gear portion 23 of the lock member 10 engages with the arc gear 24 by linear sliding instead of arc movement by the lock sliding groove 33, all the gears mesh at once and the meshing is reliable. In addition, the occurrence of tooth jumping is also prevented.

Thus, the other support / guide member 46 is provided separately from the support / guide member 3 in a pair relationship with the support / guide member 3, and the one support / guide member 3 and the other support / guide member 46 are provided. Constitutes a holding member for holding the lock member 10 and the like, and the holding members are the side bulging portions 4 and 5 of the one-side support and guide member 3 and the other-side support and guide member 4.
The other side bulging portion 47 of FIG.
8, the ring member 17 is formed.
The swelling surfaces of the side swelling portions 4 and 5 of the one-side supporting and guiding member 3 and the other swelling surface of the other-side swelling portion 47 of the other-side supporting and guiding member 46 are contacted from the left and right sides. Then, weld and fix. Therefore, the one-side supporting and guiding member 3
And the other side support and guide member 46 are welded in contact with no gap, so that the strength can be improved and a large load can be supported.

The one-side supporting and guiding member 3 and the other-side supporting and guiding member 46 abut the bulging surfaces of the side bulging portions 4 and 5 and the bulging surface of the other side bulging portion 47. When letting
One side support and guide member 3 and the other side support and guide member 4
6 can be moved relative to each other in any direction, so that both the one-side support and guide member 3 and the other-side support and guide member 46 can be brought into contact with the front and rear surfaces of the lock member 10,
Correct the production error and make the operation smoother.

Thus, the arc gear 24 is formed on the inner peripheral surface of the ring member 17, and the lock sliding groove 33 in the radial direction is formed between the one side supporting and guiding member 3 and the other side supporting and guiding member 46. Since the lock member 10 is fitted in the lock slide groove 33, the guide of the lock member 10 can be easily configured. That is, both side surfaces of the lock member 10 are sandwiched by the side bulges 4 and 5 and the other side bulge 47, and both front and rear edges of the lock member 10 are formed by the guide linear portion 8 and the other guide linear portion 54. Since the lock member 10 is sandwiched, the entire periphery of the lock member 10 is slid and moved, so that the lock member 10 is reliably slid. The outer surfaces of the side bulges 4 and 5 and the other side bulge 47 are fitted into the fitting holes 18, and the lock sliding grooves 33 are provided.
Is closed by the inner peripheral surface 22 of the ring member 17, and the left and right side surfaces of the ring member 17 are in sliding contact with the seat-side bracket 1 and the other-side flange portion 56 of the other-side support and guide member 46. Make it a closed space. Therefore, the lock member 10 in the fitting hole 18 and the cam body 28
Since the arc gear 24 is surrounded and not exposed, the operation is ensured by preventing foreign matter from being caught or the like.

In this case, the operating lever 40 and the cam body 28
Are connected to each other by an engaging pin 37 that penetrates an insertion long hole 53 formed in the other-side support and guide member 46 while being rotatably mounted concentrically by a mounting horizontal shaft 36. The side support / guide member 3 and the other side support / guide member 46 are sandwiched by the respective side bulging portions 4,
The cam body 28 located on the inner side of the outer periphery of 5 can be operated by the operation lever 40 located on the outer side, and both the surface support by the fitting member and the miniaturization of the built-in cam body 28 can be realized from the operation surface. Is secured.

A locking device 60 composed of the supporting and guiding member 3, the ring member 17, the other supporting and guiding member 46 and the like is provided on both left and right sides, and the left and right locking devices 60 are simultaneously operated by the operating lever 40. The operation coupling mechanism 61 is provided with a gear 6 on the base side of the operation lever 40.
2, the gear portion 62 meshes with the teeth 64 of the passive gear 63, and the passive gear 63 fixes one end of the connection shaft 66,
At the other end of the connecting shaft 66, another passive gear 67 having the same shape as the passive gear 63 is fixed, and teeth 68 of the other passive gear 67 are formed at the rear of a transmission arm 69 corresponding to the operation lever 40. The transmission arm 69 is engaged with the side gear portion 70, and the transmission arm 69 is axially mounted with the insertion hole 73 inserted through the mounting horizontal shaft 36 ′ arranged coaxially with the mounting horizontal shaft 36,
Since the engaging pin 37 provided on the cam body 28 is inserted through the mounting hole 75 formed in the transmission arm 69, when the operation lever 40 is operated, the gear portion 62 rotates the passive gear 63, The rotation of the gear 63 causes the connection shaft 66 to rotate, and the connection shaft 66 rotates the other-side passive gear 67, and the other-side passive gear 67 is connected to the other-side gear portion 70 of the transmission arm 69.
And the other gear 70 rotates about the mounting horizontal shaft 36 ′, and the other gear 70 rotates the transmission arm 69 about the mounting horizontal shaft 36 ′. The lock member 60 is unlocked by operating the cam body 28 of the lock device 60 on the other side with the mating pin 37.

Therefore, when the operating lever 40 provided on one of the right and left sides is operated, the lock device 60 on one side is unlocked, and the locked state of the lock device 60 on the other side is also released by the operation connecting mechanism 61, and Adjust the tilt angle of the seat. In this case, the gear portion 62 of the operation lever 40
, The other-side passive gear 67 meshes with the other-side gear portion 70 of the transmission arm 69 corresponding to the operation lever 40, and the passive gear 63 and the other-side passive gear 6 are engaged.
7 are connected by the connecting shaft 66, in the process of transmitting the operating force, each part is not twisted or deformed, the lock / unlock operation is surely synchronized left and right, the error is small, and the rotation torque is reduced. Communication is assured. Therefore, operability is improved.

Further, since the operation of the left and right locking devices 60 is synchronized, the load applied to the backrest sheet can be equally supported on both the left and right sides, and the support is reinforced. Also, as described above, since reliable operation is ensured,
The degree of freedom in the arrangement of the operating lever 40, the transmission arm 69 and the connecting shaft 66 is increased, and the degree of freedom in designing the entire seat is improved. Further, since the lock devices 60 on both the left and right sides are operated in a smaller operation space than the link mechanism, the entire device can be reduced in size and measured. Thus, the passive gear 63 and the other-side passive gear 67 have flange portions 65 and 72 abutting on the side surfaces of the gear portion 62 and the other-side gear portion 70, respectively.
Is provided, the gear portion 62 and the other-side gear portion 70 are provided.
When the passive gear 63 and the other-side passive gear 67 are located inside the inside, the mounting is completed without providing a special washer or the like, and the passive gear 63 and the other-side passive gear 67 are prevented from coming off by the flange portions 65 and 72. To prevent. Therefore, assembling and assembling are facilitated, the number of parts is reduced, and not only the work is facilitated but also the weight is reduced.

[0029]

According to the present invention, there is provided an arc gear 2 provided on one of the seat-side bracket 1 and the backrest-side bracket and concentric with the center of rotation of the backrest-side bracket.
Reclining device provided with locking devices 60 on both the left and right sides, each including a locking member 10 provided on the other of the seat-side bracket 1 and the backrest-side bracket, and having a lock gear portion 23 connected to the arc gear 24. In the apparatus, the lock member 10 is connected to the arc gear 2.
4, the operation lever 40 for connecting and disconnecting is fixed to one of the right and left locking devices 60 by the mounting horizontal shaft 36,
At the base of the operation lever 40, a gear portion 62 is provided separately or integrally, and one end of a left-right connecting shaft 66 is fixed to the passive gear 63 meshing with the gear portion 62, and the other end of the connecting shaft 66 Is fixed to the other side passive gear 67 symmetrical to the passive gear 63, and the other side passive gear 67 is separately provided at the base of a transmission arm 69 for operating the lock member 10 of the left or right other lock device 60. Since the present invention is a seat reclining device in which the other gear unit 70 provided integrally with the body is engaged, the passive gear 63 is engaged with the gear unit 62 of the operation lever 40, and the transmission arm corresponding to the operation lever 40 is provided. The other-side passive gear 67 is engaged with the other-side gear portion 70 of the second gear 69.
Are connected by the connecting shaft 66, so that in the process of transmitting the operating force, each part is not twisted or deformed, the locking / unlocking operation is surely synchronized left and right, the error is small, and the rotation torque is transmitted. Therefore, there is an effect that the operability can be improved.

Further, since the synchronization of the operation of the left and right locking devices 60 is ensured, the load applied to the backrest sheet can be equally supported on both the left and right sides, and the effect of enhancing the stability of the support can be obtained. Also, since the left and right locking devices 60 are reliably operated, the degree of freedom in the arrangement of the operation lever 40, the transmission arm 69, and the connection shaft 66 is increased,
Since the degree of freedom in the design of the entire seat is improved, and the locking devices 60 on both the left and right sides are operated in a smaller operating space than the link mechanism, there is an effect that the entire device can be reduced in size and measured.

According to the present invention, the passive gear 63 and the other-side passive gear 67 are provided with a flange 6 which abuts against the respective side surfaces of the operation lever 40 and the transmission arm 69.
Since the seat reclining device is provided with the gears 5 and 72, the gear portion 62 and the other-side gear portion 70 are provided.
When the passive gear 63 and the other-side passive gear 67 are located inside the inside, the mounting is completed without providing a special washer or the like, and the passive gear 63 and the other-side passive gear 67 are prevented from coming off by the flange portions 65 and 72. To prevent. Therefore, there is an effect that the assembling and assembling are facilitated, the number of parts is reduced, and not only the work is facilitated but also the weight can be reduced.

According to the present invention, the locking device 60 is provided so that either the seat-side bracket 1 or the backrest-side bracket is concentric with the center of rotation of the backrest-side bracket, A circular hole 24 having a circular gear 24 formed therein is provided in the seat-side bracket 1.
Alternatively, a guide straight line parallel to the radial direction passing through the center of the fitting hole 18 and the arcuate portion 7 fitted into the fitting hole 18 and slidably in contact with the inner peripheral surface 22 on either of the backrest seat side brackets A supporting and guiding member 3 constituted by side bulging portions 4 and 5 having a portion 8 is provided, and is connected to the arc gear 24 between the guide linear portions 8 facing the side bulging portions 4 and 5. Is a reclining device for a seat in which a lock sliding groove 33 into which the locking member 10 to be fitted is formed is provided.
The load applied to the backrest seat side bracket is applied to the side bulging portions 4 and 5 via the fitting holes 18, and the side bulging portions 4 and 5 support the load on the surface of the circular arc portion 7. Can be supported,
Therefore, the weight of the members such as the seat-side bracket 1 and the backrest-side bracket can be reduced to reduce the weight, and the lock member 10 slides in the radial direction passing through the center of the fitting hole 18. Since the dynamic groove 33 is formed and the lock member 10 is fitted in the lock slide groove 33, the lock mechanism can be made compact, and the lock slide groove 33 has a pair of side expansions. Since the guide portions 4 and 5 are formed between the guide straight portions 8, the guide straight portions 8 are formed.
Since the side edges of the lock member 10 are in sliding contact with each other, the slide is guided, and the slide is surely performed. There is an effect that it is easy to manufacture without any assembling and assembling, and it contributes to cost reduction and reduction in size and weight. In the process of transmitting the operating force of the left and right locking devices 60, the above-mentioned effect is exerted.

[Brief description of the drawings]

FIG. 1 is an overall exploded perspective view.

FIG. 2 is a cross-sectional view.

FIG. 3 is a side view.

FIG. 4 is a side view of a supporting and guiding member.

FIG. 5 is a longitudinal rear view of the same.

FIG. 6 is a side view and a rear view of the ring member.

FIG. 7 is a side view and a rear view of the lock member.

FIG. 8 is a side view and a rear view of the cam body.

FIG. 9 is a side view and a rear view of the operation lever.

FIG. 10 is a rear view and a side view of the other side supporting and guiding member.

FIG. 11 is a longitudinal rear view of the lock device.

FIG. 12 is a side view of the lock device excluding a seat-side bracket and a ring member.

FIG. 13 is a side view of the passive gear.

FIG. 14 is a plan view of the same.

FIG. 15 is a side view of the transmission arm.

FIG. 16 is a plan view of the same.

FIG. 17 is a side view of the unlocked state.

FIG. 18 is a side view of the lock member during movement.

FIG. 19 is a side view of the locked state.

[Explanation of symbols]

1 ... Seat side bracket, 3 ... Support and guide member,
4, 5 ... side bulging part, 6 ... insertion hole, 7 ... arc part, 8 ... guide linear part, 10 ... lock member, 11 ... central bulging part, 1
2: downward bulging part, 13: stopper surface, 14: stopper bulging part, 15: flange part, 17: ring member, 18 ...
Fitting hole, 19: ring portion, 20: mounting hole, 21: mounting portion, 22: inner peripheral surface, 23: lock gear portion, 24: arc gear, 26: cam groove, 27: unlocking escape surface, 28 ...
Cam body, 28a abutting portion, 29 abutting surface, 30 step portion,
31: lock surface, 32: lock release surface, 33: lock sliding groove, 35: insertion hole, 36, 36 ': mounting horizontal shaft, 37
... engagement pin, 40 ... operation lever, 41 ... insertion hole, 42 ...
Mounting holes 43, springs 44, springs 46, other-side support and guide members 47, other-side bulging portions 49, other-side central bulging portions 50, other-side stopper bulging portions 52 Insertion hole, 53: slot for insertion, 54: linear part of guide on the other side, 5
5: other side arc portion, 56: other side flange portion, 60: locking device, 61: operation connecting mechanism, 62: gear portion, 63 ...
Passive gear, 64 teeth, 65 flange portion, 66 connecting shaft, 67 other side passive gear, 68 teeth, 69 transmission arm, 70 other side gear portion, 72 other side flange portion,
73: insertion holes 73, 75: mounting holes.

Claims (3)

[Claims] 1. An arc gear 24 provided on one of the seat-side bracket 1 and the backrest-side bracket, and concentric with the center of rotation of the backrest-side bracket.
A reclining device provided on both left and right sides with a locking device 60 including a locking member 10 provided on one of the seat-side bracket 1 and the backrest-side bracket and having a locking gear portion 23 connected to the arc gear 24. , The lock member 10 is connected to the arc gear 24.
The operation lever 40 for connecting and disconnecting to the left and right locking devices 60 is fixed to one of the right and left locking devices 60 by the mounting horizontal shaft 36, and a gear portion 62 is provided separately or integrally at the base of the operation lever 40. One end of a left-right connecting shaft 66 is fixed to the passive gear 63 meshing with the portion 62, and the other end of the connecting shaft 66 has the other passive gear 6 symmetrical to the passive gear 63.
7, the other side passive gear 67 is engaged with the other side gear portion 70 provided separately or integrally at the base of the transmission arm 69 for operating the lock member 10 of the left or right other lock device 60. Reclining device for combined seats. 2. The operating lever 40 according to claim 1, wherein the passive gear 63 and the other-side passive gear 67 have
A seat reclining device provided with flange portions 65 and 72 respectively abutting on the side surfaces of the side of the arm and the side of the transmission arm 69. 3. The lock device 60 according to claim 1, wherein the locking device 60 is provided on one of the seat-side bracket 1 and the backrest-side bracket so as to be concentric with the center of rotation of the backrest-side bracket. There, inner peripheral surface 22
A circular hole 24 having an arc gear 24 formed therein.
Either the seat-side bracket 1 or the backrest-side bracket, the radial direction passing through the center of the fitting hole 18 and the arcuate portion 7 fitted into the fitting hole 18 and slidably in contact with the inner peripheral surface 22 A supporting and guiding member 3 constituted by side bulging portions 4 and 5 having a guide linear portion 8 parallel to
A seat reclining device in which a lock sliding groove 33 is formed between the guide linear portions 8 of the side bulging portions 4 and 5 to be engaged with the lock member 10 connected to the arc gear 24.